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The PCR was a success and your target region of 770 bp in length has been amplified. You now plan to digest the DNA amplicon
You purify your recombinant plasmid from bacterial cells, and run the plasmid (uncut. or not digested with any REs) on an aga
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In these type of questions, always remember: If a restriction enzyme has 1 cut size, in a circular plasmid, it will produce 'N' number of fragment, whereas in a linear DNA, it will produce 'N+1' number of fragments.

1. EcoR1 has 2 cut sites, and produces fragments of 2000bp and 5000bp

2. BamH1 has 1 cut site, it will linearize the DNA and produce a fragment of 5kb

3. Eae1 has 1 cut site, it will linearize the DNA and produce a fragment of 5kb

4. EcoR1+BamH1+Eae1 will have 4 cut sites in total, and produce fragments of sizes 1200bp, 800bp, 1000bp, and 2000bp

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